ValueError: unknown url type: '['
import urllib.request,re
req=urllib.request.urlopen('https://www.imooc.com/course/list')
buf=req.read().decode('utf-8')
listurl=re.findall(r'src.+.jpg',buf)
list_url=re.sub(r'src="','http:',str(listurl))
i=0
for url in list_url:
f=open(str(i)+'.jpg','wb')
req=urllib.request.urlopen(url)
buf=req.read()
f.write(buf)
i=i+1
f.close第9行报错ValueError: unknown url type: '[' 是什么情况呢
